On 11/15/20 3:32 AM, Łukasz Posadowski wrote: > Do anyone can suggest what else I forgot to do? Use metadata version 1.2 instead of 0.9. You need for the filesystem to be not visible until after the RAID is assembled, and the easiest way to do that is to put the metadata at the beginning of the drive and the partition table inside the RAID volume. With metadata version 0.9, the partition table is technically inside the volume, but it's at the same offset that it would be for a disk with no RAID volume, so it can be recognized before the volume is assembled.